Question 204263
h^2 -9hs +9s^2 
Using the quadratic equation:{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}  we get.
h=(9+-sqrt[-9^2-4*1*9])/2*1
h=(9+-sqrt[81-36])/2
h=(9+-sqrt45)/2
h=(9+-6.7082)/2
h=(9+6.7082)/2
h=15.7082/2
h=7.8541 

h=(9-6.7082)/2
h=(2.2918/2
h=1.1459 
(h-7.8541s)(h-1.1459s) ans.